cpp-lazy-stream/test/all_test.cxx

//
//  all_test.cxx
//  stream-test
//
//  Created by Sam Jaffe on 4/2/23.
//

#include "stream/view/all.h"

#include "stream_helpers.h"
#include "stream_matchers.h"

using testing::Ne;

TEST(AllView, IteratesOverNonConst) {
  std::vector<int> input{1, 2, 3, 4, 5};
  auto view = views::all(input);

  EXPECT_FALSE(view.empty());
  EXPECT_THAT(view.size(), input.size());
  EXPECT_THAT(view, RangesEq(input));
}

TEST(AllView, IteratesOverConst) {
  std::vector<int> const input{1, 2, 3, 4, 5};
  auto view = views::all(input);

  EXPECT_FALSE(view.empty());
  EXPECT_THAT(view.size(), input.size());
  EXPECT_THAT(view, RangesEq(input));
}

TEST(AllView, TakesOwnershipOfRvalue) {
  std::vector<int> input{1, 2, 3, 4, 5};
  auto * address = &input;
  auto view = views::all(static_cast<std::vector<int> &&>(input));

  EXPECT_TRUE(input.empty());
  EXPECT_THAT(&view.base(), Ne(address));
}

TEST(AllView, IteratesOverRvalue) {
  auto view = views::all(std::vector{1, 2, 3, 4, 5});

  EXPECT_FALSE(view.empty());
  EXPECT_THAT(view.size(), 5);
  EXPECT_THAT(view, RangesEq(std::vector{1, 2, 3, 4, 5}));
}